Pump construction



y 1945- c. l. LONGENECKER 2,375,802

PUMP CONSTRUCTION Filed May 28, 1942 2 Sheets-Sheet 1 I I 5&9.

I CHA'RLES LLONGENECKER, 5- 4 w,

May 15, 1945.

LONGENECKE R PUMP CONSTRUCTION 2 Sheets-Sheet 2 Filed May 28, 1942 CHAS.l- LONGENECKER,

PUMP CONSTRUCTION Charles I. Longenecker, Wauwatosa, Wis., assignor toChain Belt Company, Milwaukee, Wis., a corporation of WisconsinApplication May 28, 1942, Serial No. 444,891

1 Claim.

The invention relates to pumps, and more particularly to centrifugalself-priming liquid pumps of the general type referred to in prior U. S.Patents No. 1,989,061 granted January 22,

1935; No. 2,022,624 granted November 26, 1935;

and No, 2,217,380 granted October 8, 1940; and it has for one of itsprincipal objects the provision of an exceptionally light weight pumpconstructed largely of sheet metal to facilitate portability but whichat the same time will withstand wear remarkably well when handling dirtyor gritty liquids, and which can be quite easily disassembled andreassembled for inspection and/or repair in case of necessity.

With the above and other objects in view which will appear as thedescription proceeds, the invention resides in the novel details ofconstruction, parts and combinations of parts more fully hereinafterdescribed,

In the accompanying drawings forming part of this specification, inwhich like reference characters designate like parts throughout theviews, one form of the invention has been illustrated for purposes ofdisclosure, but not necessarily of limitation, in accordance with therequirements of the patent statutes.

In the said drawings:

Figure l is an end elevational view of a pump constructed in accordancewith the invention, with a prime mover such as a small internalcombustion engine associated therewith for driving Figure 2 is a sideelevational view, on a slightly larger scale and with a portion of thepump body or casing broken away and in section, of the pump shown inFigure 1, as seen from the left of said figure;

Figure 3 is a central sectional view,- taken approximately on the planeindicated by the line 3-3 of Figure 1, looking in the direction of thearrows;

Figure 4 is a sectional View taken approximately on the planes indicatedby the line 44 of Figure 2, looking in the direction of the arrows;

Figure 5 is a similar view taken approximately on the plane indicated bythe line 5-5 of Figure 2; and

Figure 6 is an expanded perspective view, partly in section,illustrating the several elements and subassemblies of the pump in theirrelative positions or order in assembly or disassembly.

Referring more particularly to said drawings the pump as hereshowncomprises a casing or body H) constituting a delivery and priming waterchamber and having a pair of spaced heads or end members H and I2 whichare preferably formed by stamping or drawing disks of sheet metal toprovide peripheral flanges l3 and I4 respectively. The said heads arespaced as shown and their flanges l3 and M are surrounded by a sheetmetal strip or ring l5 which is welded at its edges to the said flangesas indicated in the drawings, Angle members 16 and I! each have one oftheir legs welded to the stri l5 while their other legs are welded to abridge member I8 and constitute a foot or base for the pump as will bereadily understood, and an outlet tube or pipe 20 extends through thering member 15 at its upper part, being welded thereto and communicatingwith the chamber within the casing to constitute a conduit through whichthe liquid is discharged from the pump. This outlet conduit ispreferably provided with an angularly disposed branch 2| normally closedby a threaded plug 22, which branch is utilized for the introduction ofwater into the casing chamber to initially prime the pump beforestarting it into operation.

An impeller chamber 24 is also provided within" the casing Ill, beingcarried in whole or in part by the head I 2 and comprising a strip ofsheet metal 25 curved to spiral or volute form and having one end 26welded to the flange 14 of the head I2. Said strip is also welded alongone edge to the head l2 throughout substantially its entire length whileits other edge is welded to a vertical partition plate 21 positionedsubstantially in the plane of the inner edge of flange l4, as will beclear from Figure 3. The said plate 21 is provided with a centralopening 28 through which the liquid may enter the impeller chamber 24;and an annular flange 29 is welded or otherwise rigidly secured to thesaid partition wall for a purpose to be later described.

The head or end plate I2 is provided with a relatively large circularopening 30 through which the pump impeller 3| may be introduced into theimpeller chamber 24, as will be readily understood from Figures 3, 5 and6. The said impeller as here shown comprises a sheet metal disk 32welded to a central hub 33 and having a plurality of impeller blades 34edge welded thereto as will be clear from Figures 5 and 6. The hub 33 isthreaded or otherwise detachably secured upon a shaft 35, here shown asbeing the end portion of the power shaft of the internal combustionengine E illustrated in Fig, 1. The said shaft extends through a member36, constituting a portion of the frame or casing of the said engine,and through a tubular housing 3'! which has the annular flange members38 and 39 welded to its respective ends. The flange 38 is of suiflcientdiameter to close the opening 36 in the head l2 and is normally securedin posi-' tion thereover by nuts and bolts 453, the latter of which aretack welded to the head (2. A bushing 4| is pressed into the tubularhousing 31 and carries the stationary member 4! of a sealing structure,which also includes a rotatable sealing ring 42 engaging the end face ofthe member 4| and driven by the bent arm 42' [from the impeller plate32, see Fig. 3. A packing ring 43, of rubber, fibrous or other suitablematerial, also surrounds the shaft 35 and assists in preventing theescape of water from the pump and grease or other lubricant thereinto.The flange 39 is secured to the engine frame member 36 by screws orbolts 44.

The opposite head I I of the pump casing is also provided with arelatively large central opening 45 which is normally closed at least inpart by the disk 46 of an inlet valve assembly, such disk beingdetachably secured in place by nuts and bolts 41, the latter of whichare tack welded to the head II to be permanently carried thereby. Thedisk 46 has an inlet conduit or nipple 48 welded to its central ortion,extending outwardly therefrom; and a second conduit 49 is welded to andextends inwardly from its opposite side. This last tube or conduitconstitutes a support or seat for an inlet check valve 50 of the fiattype, which is secured to and supported by a strut welded to and rigidlycarried by the member 49.

Surrounding the inlet check valve 50 is a tubular member 55 whichextends from the disk 46 of the inlet valve assembly to the annularflange 29 carried by the partition wall 21; as clearly indicated inFigs. 2 and 3. The inner end of this member 55 has a sliding fit uponsaid flange 29 and a rubber or other resilient washer 56 is interposedbetween the end face of the member 55 and the partition wall 21, as willbe readily understood from Figs; 3 and 6.

The tubular member 55 constitutes a conduit for conducting the incomingliquid from the valve 50 to the inlet port 28 of the impeller chamber24. and it also serves to support a valve for controlling the admissionof priming water from the delivery and priming water chamber to theinlet port 28 of the impeller chamber. That is to say, the said member55 is provided with a laterally extending passage 60 having a port 6|affording communication between the delivery and priming water chamberand the interior of the member 55, which port is controlled by a primingwater valve 62, which is or may be of the type disclosed and claimed inthe prior U. S. Patent No. 2,217,380 referred to above.

As best shown in Figs. 4 and 5, the end of the volute strip 25 oppositeits rigidly attached end 25 is preferably folded back upon itself asindicated at 65 and has removably attached to it, as by the screw 66, apeeler element 61, the sharpened edge 68 of which co operates with theperiphery of the impeller 3| in a manner fully disclosed in the prior U.S. Patent No. 1,989,061 mentioned above.

With the exception of the member .55, which is here shown as a casting,the various other tubular elements heretofore described preferably takethe form of short sections of standard seamless pipe, which are not onlyrelatively inexpensive but also lend themselves quite well to thewelding operations whereby the various .disks and other members arerigidly secured to them. They are also quite resistant to wear and thuscontribute to the long life of the pump.

As will be best understood from Figure 6 the casing I I] is constructedby encircling the .fianges I3 and I4 of the spaced heads II and I2 withthe strap or ring member I5, which is then welded in place. The volutechamber 24 is preferably constructed on the head I2 before it isassembled chamber; a rigid as just described, by welding the flange 29to the partition plate 21, welding the end 26 of the volute strip 25 tothe flange I4 of the head, and edge welding the said strip .to the head,after which the partition member 27 may be welded to the other edge ofthe said strip. The members I6, I1 and I8 are welded together and to theoutside'of the casing to constitute the base or support for the pump,and the outlet conduit ZIlis positioned and welded in place.

, The impeller assembly is assembled as a separate unit, as is also theinlet check valve assembly, and the tubular intake conduit 55 and itspriming control valve 62. With the various subassemblies thus completedthe pump may be completely assembled by introducing the impeller 3|through the'opening .30 in the head I2 and securing the flange or disk38 of the impeller assembly housing to the head by means of the screwsand nuts 40, a packing gasket or washer 69 being preferably interposedbetween the said disk and head.

The packing washer 56 is then introduced through the opening 45 in thehead II and positioned on the flange 29, whereupon the tubular member 55is likewise inserted through the opening 45 and its end engaged upon thesaid flange 29 which serves as a positioning guide and support therefor.The inlet check valve assembly is then brought to position and its disk46 secured to the head II by the nuts and bolts 41, a packing gasket 10being interposed between the parts as will be readily understood. Thisgasket is pressed against the adjacent end of the tubular member 55 asthe nuts on the bolts 41 draw the disk 46 home and firmly presses thesaid tubular member against the sealing gasket or washer 56, thusretaining the said tubular member in the operative position shown inFigure 3.

If desired the head II may be provided with a short sleeve II to providea drain opening for the pump chamber, which opening will of course benormally closed by a plug 12.

It will be clear from the foregoing that the present pump is constructedfor the most part of sheet metal elements, and of standard seamlesspipesections and it is therefore not only relatively inexpensive tomanufacture but is highly resistant to wear and very light in weight sothat it may be readily transported from place to place.

Having thus described the invention what is claimed is:

In a light-weight pump of the rotary self-priming type: a, sheet metalcasing having a pair of spaced heads, a volute strip secured to andprojecting inwardly from one of said heads, and a thin partition platesecured to the inner edge of said volute strip and in conjunction withthe latter. dividing the interior of the casing into an impeller chamberand a priming-liquid chamber, said plate having an inlet port for saidimpeller chamber; an impeller in said impeller flange carried by saidpartition plate surrounding said inlet port and extending into thepriming-liquid chamber; an inlet and priming-liquid conduit having oneend removably seated on said flange, said conduit extending from theflange to the other head of the casing; and

an inlet valve assembly detachably secured to the last mentioned casinghead and engaging the adjacent end of the inlet conduit to press thelatter home and maintain it in position of the flange.

CHARLES I: LONGENECKER.

